Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2007-12-25
2007-12-25
Korzuch, William R. (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S078050, C360S077160, C360S077120, C360S078020
Reexamination Certificate
active
11062224
ABSTRACT:
The invention provides techniques for adjusting for actuator non-linearities in a data storage system. The invention is particularly useful for piezoelectric actuators, such as actuators that implement a bimorph piezoelectric crystal structure or a laminate piezoelectric crystal structure, although other actuators may present similar non-linearity issues. In one embodiment, the invention provides a method comprising applying a signal to an actuator of a data storage system, the actuator having a non-linear response, wherein the signal includes a linear drive component and a non-linear adjustment component, and positioning a data storage head with respect to a data storage medium via the actuator.
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Co-pending U.S. Appl. No. 11/051,371, filed Feb. 3, 2005, Anderson et al., entitled “Piezoelectric Crystal Actuator and Techniques for Hysteresis Reduction”.
Anderson James S.
Langlois Denis J.
Imation Corp.
Korzuch William R.
Levinson Eric D.
Olson Jason
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